Algebra › Quadratics

0/0 this session +0 XP
Multiple choice Easy factorisingmonic ~50s

Factorise: x² + 7x + 12

Hints are free to take and they are counted. A correct answer after two hints moves your mastery less than one without — which is the honest way to score it.

Why this question? this skill is new to you; it consolidates something easier; and it needs calibrating — few people have tried it Predicted chance you get it: 69% — the selector aims at 78%.
difficulty fit 0.68
skill need 0.75
review boost 0
calibration bonus 0.12
recency penalty 0
repetition penalty 0
frustration 0